Uefa has announced a formal investigation into the multi-million pound transfer window spending of Paris Saint- Germain, and whether it has complied with financial fair play (FFP) rules requiring clubs to break even.

Uefa has heavily criticised the World Anti-Doping Agency for wrongly flagging up a positive drug test by the Liverpool defender Mamadou Sakho after he took a fat-burner without the club’s knowledge last year.

José Mourinho says the pitch for Manchester United’s Europa League group match may require a “miracle” to be playable and has questioned why Uefa allowed their final tie, against Zorya, to be played in mid‑December in Ukraine.

Scottish clubs need to play in a cross-border league to avoid “being left behind”, according to the chief executive of the country’s Football Association. A Champions League place for the winners is among the ideas being considered.

As Monaco prepare to take on Tottenham Hotspur at Wembley on Wednesday, they have signalled their intention to lobby against the imminent revamp of the Champions League, which the club views as a “prototype of a Super League” in which “France is the big loser”.

Uefa has announced a formal investigation into the multi-million pound transfer window spending of Paris Saint- Germain, and whether it has complied with financial fair play (FFP) rules requiring clubs to break even.

Uefa has heavily criticised the World Anti-Doping Agency for wrongly flagging up a positive drug test by the Liverpool defender Mamadou Sakho after he took a fat-burner without the club’s knowledge last year.